Method of manufacturing press-button parts



M. GRUSCHKA AND F. MARJANKU. METHOD OF MANUFACTURING PRESS BUTTON PARTS. APPLICATION FILED AUG-3. m4. RENEWED Nov. 21. |9|9.

Patented Jam 6,1920.

7 SHEET S-SHEET I.

FE RDI VA IV INVENTORS BY 4x 4- ATTORNEY.

.M. GRUSYCIHKA AND F. MARJANKO.

METHOD OF MANUFACTURING PRESS BUTTON PARTS. APPLICATION FILED AUG.3. 1914. RENEWED Nov. 21,1919.

1,327,322. Patented Mi. 6; 1 920.

ZSHEETS-SHEET 2.

s1 s1 TIE- 7 V 55%;: Eg 1E! lN-YENTURS wmsssEs 4 M BY 4; ,t w a 67W 1 ATTORNEY M GRUSCHKA AND F MARJANKO METHOD'OF MANUFACTURING PRESS sunom mfs. APPLICATION FILED AUG-3,1914; RENEWED NOV; 21. I9l9- 1,327,322, Patented Jan. 6,1920.

ISHEETS-SHEET a;

o o o o 0 0 o o o o o o o o o 0 0 o o o o o o o 0 o o O O O, O O v O o o o o o o o o o o '1' TN ESSES M- GRUSCHKA AND F- MARJANKO. METHOD or MANUFACTURING PRESS BUTTON PARTS. APPLICATION FILED AUG-3,19l4- RENEWED NOV. 21.199- 1,327,322, Patented Jan. 6, 1920.

TSHEETS-SHEET 5- 'NITNEQQES INVENTORS M. GRUSCHKA AND F. MARJANKO. METHOD OF MANUFACTURING EBESS B UTTON PARTS. APPLICATION FILED AUG-3.19M. RENEWED NOV. 21, 1919. I

1,327,322, Patented Jan. 6, 1920.

7 susrs su z n 6.

Jnventors:

M. 'r'ruschlu. E M TjQW/kU.

By 64 40w/M MAX GRUSCHKA AND FERDINAND MARJANKO, 0F PRAGUE, AUSTRIA.

METHOD OF MANUFACTURING PRESS-BUTTON PARTS.

Specification of Letters Patent.

Patented Jan. 6, 192th Application filed August 3, 1914, Serial No. 854,830. Renewed November 21 1919. Serial No. 339,681.

To all whom it may concern:

Be. i-t-- known that we, MAX GRUSCHKA and FERDINAND MARJANKO, subjects of the Emperor of Austria-Hungary, and residing at Konigliche WVeinberge, Prague, Bohemia, Austria, have invented Methods of Manufacturing Press-Button Parts, of which the following is a specification.

Our invention relates to a method of manufacturing press-button parts and conveying the same to finishing tools which ef- ,1

parts in the conveyor device.

feet the inserting and securing of the springs in the press button parts and the bending or 3 'the machines used hitherto deliver always curling of the press button edge.

The method of manufacturing the press button parts consists in stamping out, from a metal strip which has been previously subjected to the operation of drawing from the metal raised cup-shaped portions each of which has been provided with lateral incisions, a group of circular disks having said cup shaped portions in their centers; in drawing the stamped disks into the shape of cylindrical press-button parts; and in immediately transferring the press-button parts in groups to a conveyer device which conveys the same to the finishing tools. Said conveying operation is so carried on that the press-button parts, during their travel on the conveyor device to the finishing tools and during their further treatment by the finishing tools, are kept free from any interference of the stamping and drawing tool.

In proceeding thus it is preferred, be tween one operation stage and the following, to change the groupings of the press-button parts simultaneously subjected to operating tools in the same machine, whereby each following group of press-button parts is composed of other press-button parts than the preceding group.

The changing of the groupings of the press-button parts takes place in such a manner that the following group of press-button parts is formed out of parts of two or sev-.

eral original groups of press-button parts having the same composition.

By the improvements in the manufacture,

possible to arrange the operating points in asingle and suitable manner, and to lead the press-button parts to the operating points immediately after they have left the known stamping machine by means of an equally simple and suitable conveying apparatus.

Simultaneously the advantage is obtained, that during the formation of the spring and the insertion of the same in the press-button part, the stamping toolpannot disturb} or displace the position of the press-button Contrary tothe subject of our invention,

only one partly prepared press button td the conveyer device, inorder to lead it to" the further operations. This is attained by leading in a metal strip with only one partly prepared press-button part, which sults however in a comparatively large es of material and therefore unfavorably" influences the profitableness of manufacture, or else it is attained by leading in a metal strip with several. partly prepared press-button parts, whereby however only onef-button is always stamped out of the metal strip, which requires a considerably more complicated manner of conveying the metal strip. In both cases, moreover, only one button is dealt with and completed, as mentioned above, at a time.

The drawbacks as set forth above are removed by the subject of our invention by the fact that the press-buttons which are partly prepared in large numbers in a metal strip are taken to the operating points in groups as required and in large numbers simultaneously, whereby the conveying is just as simple as if a metal strip with only one partly prepared button were led in. It is clear that not only the loss of material is, I

considerably reduced thereby, but also a large number of button parts can be simul-- taneously completed, whereby the manufacture of the press buttons is very considerably cheapened as compared with the above named methods employed hitherto.

In order to render clear the characteristics of the subject of our invention, the same will now be described. with reference to the arrangements shown by way of example on, the accompanying drawings. 7 i

Figure 1 shows the stamping device partly in vertical section and partly in side elevation.

- ton part in section before it is dished, and

Fig. .7 shows the stamped out press-button part in section after it has been d shed. Fig. 8 shows a link of the conveyer device in plan.

. Fig. 9 shows a section on line C-C of Fig. 8.

Fig. 10 shows a section on line DD of Fig. 8.

Fig. 11 shows a plan of the conveyer device and of the tools for the production and insertion of the springs.

Fig. 12 is a side elevation of same, and

Fig. 13 is a vertical section on line E-E of Fig. 11.

Figs. 14-16 show, in plan, the tools which produce the springs in their positions be fore and after the same have been produced.

Figs. 17-20 show to a larger scale the tool for inserting one of two finished springs in the' press-button, these figures showing the process in several of its phases.

Figs. 21-22 show to a larger scale in plan and in section respectively the pressbntton provided with springs before the edge of the press-buttons has been. finally bent over.

Fig. 28 shows in section the press-button, provided with springs after the'edge of the press-button has been finally bent over.

Fig. 245 shows diagrammatically the two chain wheels with the conveyer chain and the operating points in side elevation.

is can be seen from the drawings, the stamping device consists of the die f and of the part 72 which carries the stamp g. A plate z' is provided with openings through which the stamps 9 pass. With the plate 2' are rigidly connected the cylindrical punches is, by means of which the punching out of the previously stamped press button parts from the metal plate m l) is effected. The plate 2' is held by means of the catches a, n at a certain distance from the plate h. In this case the stamps 9 cannot move rela tively to the plate 2' and to the punches is connected to same. The die f is provided with a plurality of openings 0, which correspond to the arrangement of the stamps g. Below the die-plate 7 there is situated the plate p, which is provided with. dies (,1 which likewise correspond in number and position to the stamps 9. These dies 9 have their largest diameter at a point situated a third of the way down from the top, and diminish in diameter toward the top and bottom. l/Vhen the punched out press-button parts (Fig. 6) pass these dies, they are drawn and receive the shape shown in Fig. 7. On the plate 7 there are provided on both sides the cheeks 8 having inclined surfaces 1 at the top. When the catches a, a come into contact with the inclined surfaces r of the cheeks s, which happens as soon as the punches have punched the press-button parts out of the metal strip m, the plate 2' comes to bear against the plate 7', and the catches a, a are pushed aside by the inclined surfaces 1' away from the plate 2'. When plate 2' has been thus released, the head it in its descent will approach the said plate 2' and the punches 9 will be able to force the disks out from the metalb]ank down through dies 9. On forcing said disks through the downwardly tapering dies 9, the flange of the disk is raised and the dies are drawn into the shape illustrated at Fig. 7.

As can be seen from Fig. 2 the stamps g and the punches is together with the appertaining dies are arranged in groups, for example of 5 each.

The punching out of the press button parts from the sheet m (Fig. 4) is carried. out in such a manner, that in the first place the press-button parts e are stamped out. Since the scale to which the metal strip is drawn in Fig. 4 is exactly the same as that of Fig. 2, it follows that the five press-button parts e in Fig. 4 are at the same distance from one another as the stamps in Fig. 2. After the punching out has been eiiected, the metal strip m is advanced to the extent a whereupon the stamping out of the parts 0 is effected. After the metal strip m has again been advanced one step, the parts '0 are punched out, and so forth. The parts which are stamped out at each particular operation are shown in Fig. 4 with the same shading. This method of punching parts out has the advantage that the dies 9 are at a comparatively large distance apart, so that they can be arranged to be exchangeable.

Below the plate 79 there is provided a space i (Fig. 3) for the conveyer device, the individual links of which are shown in Figs. 8 to 10. The conveyer device consists of frame shaped links 1, which are connected together jointedly by means of hinge-bolts 2 in the same manner as the links of a flat link chain. This conveyer carries the pressbutton parts by successive steps into proper positions for being operated upon by the finishing tools which perform the various steps in inserting the springs and effecting the final formation of the complete parts. The conveyer frames 1 are formed to suit the distribution of the dies of the stamping device, 2'. 6. they have apertures 51 which are arranged in a group in exactly the same manner as the dies 9. When the press-button parts are punched out, one of the frames: 1 is situated below the plate 72 in such a manner that the apertures 51 are below the dies 9. The result of this is, that when the stamps 9 move downwardly the punched out and drawn press-button parts are pushed into the apertures 51 of the frame 1. The apertures 51 are provided with recesses at as many points as there are springs to be inserted. According to the present example, in which the press-buttons are to be provided with only two springs, each aperture possesses only two oppositely disposed recesses 52. The slots 53 open into the apertures 51, and have mounted slidably in them the slides 54 which are subjected to the action of springs 55. The springs 55 tend to force the slides 54 against the press-button parts and in this manner to hold the press-button parts securely in the apertures 51. For guiding the frames 1 which are joined together to form a chain, the two chain wheels 3 are provided. The latter are mounted on rotatably mounted shafts 4 and are of polygonal form, each side of the polygon being of the same length as one of the frame-like links. On one of the shafts 4 there is, as can be seen from Figs. 11-13, mounted the star-wheel 5, which is provided with slots 6. Below the chain wheel 3 is situated the shaft 7 which is rotatably mounted at 8 and which is provided with the driving belt pulley 9. On the shaft 7 is fixed the crank arm 10, which is provided with a pin 11. The length of the crank arm 10 is chosen such that during one entire revolution in the direction of the arrow 12 it engages once by means of its pin 11 with one of the slots 6 and thus rotates the star wheel 5 and therewith also the shaft 4 and the chain wheel 3 one-fifth of a revolution in the direction of the arrow 13. The shaft 15 is rotatably mounted at 14, 14 and has mounted upon it the bevel wheel '16 which engages with the bevel wheel 17 of the shaft 7. On the shaft 15 are mounted the two pinions 18 and 19, which transmit the rotation of the shaft 15 by means of the chains 20 and 21 to the wheels and '23 of the shafts 24 and 25 respectively. The shafts 24 and 25 which are mounted at 26, 27 actuate by means of their cams 28, 29 the tools 57, 58 for the production of the springs, said tools being slidably mounted in the table 56. The tool for forming the springs, which is claimed in Letters Patent No. 1,128,473 of the applicants and does not form a part of the present invention, is arranged above the conveyer chain 1 and consists substantially of two members 57, 58, slidably mounted in a table 56. (Figs. .1416.)

The ends of the members 57, 58 are shaped to correspond to the shape of the spring, which has to be formed so that the member 57 working together with the member- 58 (Fig. '16) produces the required shape for the spring. While the cams 28 and 29 tend to push the members 57 and 58 into the positions shown in Fig. 15, the springs 59 and 60 tend to press the members 57 and 58 against the cams, thus tending to bring said members to their original positions.

The wire 39 which serves for making the springs is guided in the table 56 and the part 62. If now the member 57 is pushed forward into the position shown in Fig. 14, and the member 58 into that shown in Fig. 15, the wire is bent by the nose of the member 58 into the forked end of the other member 57. If now the member 58, 57 again resume their original positions, the stop-pin 61 which is rigidly connected to the table 56 prevents the springs from being bent away. The finished spring 76 which is still connected to the wire 39 is in the position shown in Fig. 16, namely above the pressbutton 49, in which it is to be inserted. The table 56 is provided with openings 67 at the points where the insertion of the springs is effected, said openings 67 corresponding to the apertures 51 in the conveyer frames.

On the shaft 15 there is further fixed the pinion 30, which transmits its rotation by means of the chain 31 to the pinion 32' of the shaft 33. On the shaft 33 there is fixed the spur wheel 34 which meshes with the spur wheel 35 of the shaft 36. On the shafts 33, 36 (Fig. 13) are mounted the two cams 37 and 38, which are so formed, that they act as feeding cams for moving the wire 39 forward on half their circumference only. The wheel 40 fixed on the shaft 15 transmits its rotation by means of the chain v41 to the wheel 42 of the shaft 43. The shaft 44 is mounted rotatably parallel to the shaft 43. The rotation of the shaft 43 is transmitted to the shaft 44 by means of the pinions 45, 46 Fig. 13). On the shafts 43 and 44 are provided the cams 47 and 48 for actuating the tools for effecting the insertion of the springs, especially the slides and the stamps 64, 73.

The tool for inserting the springs in the press-buttons, which is claimed in the aforesaid Patent 1128473 and does not form a part of this invention, consists of the stamps 64, 73. The stamp 64 is slidably mounted in a slide 65 in such a manner that it can yield backward. The slide is guided by a standard 66 arranged on the table 56. In the table 56 are provided the openings 67 which correspond to the recesses 52 in the links 1 of the conveyer chain. The stamp 64, which is subjected to the action of the spring .69, is limited in. its stroke by the guiding pin 70, which engages in the corresponding slot 71 in the stamp. The stamp 73, which is also movably mounted in the slide 65 and which is adjustable by means of the screw 74, efi'ects the cutting off of the spring from the main wire as well as the work of inserting the spring and the bending over of a portion of the press-button edge after the spring has been inserted in the press-button and cut off from the main wire. For engaging the spring and cutting it off from the main wire 39 and for bending the spring down, the stamp is pr0- v'ided at the bottom with the notch 75 (Fig. 17).

The slide 65 is pressed downwardly together with the stamps Ge and 73 by means of the cam 47 until the bottom edge of the stamp 6 f bears on the previously formed spring 76, which is still in one piece with the main wire 39. On the stamp 64 now continuing its downward course the inner free end of the spring 76 is deflected down w rd (Fig. 18), the other end of the spring 76 still remaining attached to the wire 39, which is kept in place by the partGQ. On the stamp 64 traveling still farther downward its cup-shaped hollow 68 embraces the press-button cap 72 and finally presses the press-button down on the table 56 whereby the press-button is held immovably in its place.

If now the slide 65 continues to travel farther downward, the stamp 73 arrives, by way of the slot 91 in the machine bed, in the slot 52 of the conveyer frame. In so doing the stamp 73 engages the spring 7 6 by means of its notch 7 5, cuts the spring at the edge 78 (Figs. 1418 of the adjustable piece 62 from the main wire and when the slide arrives at the bottom of its stroke, bends over the edge of the pressbutton at 79 (Figs. 2022) to an extent equivalent to the breadth of the stamp 7 3, the inner end of the spring 76 slipping into the slot 50 of the press-button cap 72.

When the conveyor chain frames 1 which are filled with press-button parts arrive at the tools for the production and insertion of the springs (Fig. 11), the springs are according to the present example of construction formed and inserted on one side of the buttons at the five points designated with a, .7), 0, (Z, 6, whereby the wires 39 are in the first place fed forward, then the parts 57, 58 and finally the slides 65 are actuated, in succession by the main shaft 7. For this purpose the cams 37, 38 which bring about 'he feeding forward of the wire, further the eccentrics 28, and 29 actuating the parts 57 and 58, and finally the cams 4-7, 48 actuating the slides 65 in the guides 66 are arranged in displaced relation to one another. As soon as the Wires 39 are fed forward at the operating points a-e, and the frames 1 is moved forward one step farther,

whereby new press-button parts which are not yet provided with springs arrive at the operating points ae.

As may be seen from Fig. 11, of the three groups of pressbutton parts each of which is situated in one of the frames 1, a further group consisting for instance of the pressbutton parts a, Z), 0, (Z, c is formed. The press-button parts of said further group are subjected simultaneously to the action of the slides 65 and the stamps 64, 73 12).

As shown diagrammatically in Fig. 24L, the press-button parts punched out by the stamps of the stamping device are transferred directly to the conveyer device at I. On further movement of the conveyer device the press-button parts arrive at the tools which effect the formation and the insertion of the springs in the press-button parts. This is effected, as shown in Fig. 24, at the points 11 and 111 when the frames are stationary, the springs being inserted in the press-button parts on one side of the buttons at H and on the opposite side of the buttons at III. On further movement of the frames the press-button parts arrive at the tool IV. This tool consists of a known stamping device, which is intended to bend or curl over the remaining portion 92 (Figs. 21432) of the press-button edge. The stamping here is effected upward from underneath.

After the press-buttons have thus been completed, they are pushed back into the frames by the same stamping tool and, on the frames being conveyed farther, they arrive at working position V (Fig. 2a) where they are pushed out of the frames by means of stamps arranged in groups. I

The press-buttons thus pressed out of the frame are, as Fig. 23 shows, provided with springs 76, on both sides and are then ready for use.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is 1. A method of manufacturing pressbutton parts, consisting in stamping out from a metal strip, which has previously been subjected to the operation of drawing from the metal raised cup-shaped portions, each of which has been provided with lateral incisions, groups of circular disks, having said cup-shaped portions in their centers, in drawing the stamped disks into the shape of cylindrical press-button parts, and in immediately transferring the press-button parts in the same groups in which they are stamped out, to the gripping device of a conveyer, progressing at intervals and conveying the press-button parts to spring inserting and securing tools operating on differently located press-button parts in the several groups simultaneously whereby the press-button parts which are operated upon simultaneously will differ in location in their respective groups from one operation stage to the following.

2. A method of manufacturing press-button parts consisting in stamping out, from a metal strip which has previously been subjected to the operation of drawing from the metal raised cup-shaped portions each of which has been provided with lateral incisions, a group of circular disks having said cup-shaped portions in their centers; in drawing the stamped disks into the shape of cylindrical press-button parts; in immediately transferring the press-button parts in groups to a conveyer device which conveys the same to the spring inserting and securing tools; conveying each group into position to be operated on by successive sets of spring inserting and securing tools, and operating upon differently positioned individual press-button parts in each group simultaneously.

3. A method of manufacturingpress-button parts consisting in stamping'out, from a metal strip which has previously been subjected to the operation of drawing from the metal raised cup-shaped portions each of which has been provided with lateral incisions, a group of circular disks having said cup-shaped portions in their centers; in drawing the stamped disks into the shape of cylindrical press-button parts; in immediately transferring the press-button parts in groups to a conveyer device which conveys the same to the spring inserting and securing tools, said conveying operation being so carried on that the press-button parts, during their travel on the conveyer device to the spring inserting and securing tools and during their further treatment by the spring inserting and securing tools, are kept free from any interference of the stamping and drawing tool; conveying each group in its original arrangement of parts beneath successive sets of spring inserting and securing ton parts consisting in stamping out, from a metal strip which has previously been subjected to the operation of drawing from the metal raised cup-shaped portions each of which has been provided with lateral incisions, a group of circular disks having said cup-shaped portions in their centers; in drawing the stamped disks into the shape of cylindrical press-button parts; and in im-- mediately transferring the press-button parts in groups to a conveyer device which conveys the same to the spring inserting and securing tools, conveying each group in its original arrangement of parts into operative position to a set of spring inserting and securing tools, operating upon certain buttons of the group, conveying the group by successive steps-from. thefirst set of spring in.- serting and securing tools to operative position relative to other setsof spring inserting and securing tools and at each step operating upon press-button parts in the group not previously subjected to the same characterof operation until all theipress-button parts in the group have been subjected to the same operation difi'erently positioned parts of each group being simultaneously operated upon by the tools of the diiierent sets, the original relative positions of the parts in a group being maintained throughout the entire series of operations.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

- MAX GRUSCHKA.

Witnesses:

OSKAR Lus'rre, FRANZ KAUFMANN.

FERDINAND Witnesses OTTO BERNDT, HENRY HASPER.

MARJANKo. 

